61822136667 has 4 divisors (see below), whose sum is σ = 82429515560. Its totient is φ = 41214757776.

The previous prime is 61822136611. The next prime is 61822136689. The reversal of 61822136667 is 76663122816.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 61822136667 - 2¹⁶ = 61822071131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61822136767) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10303689442 + ... + 10303689447.

It is an arithmetic number, because the mean of its divisors is an integer number (20607378890).

Almost surely, 2^61822136667 is an apocalyptic number.

61822136667 is a deficient number, since it is larger than the sum of its proper divisors (20607378893).

61822136667 is a wasteful number, since it uses less digits than its factorization.

61822136667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20607378892.

The product of its digits is 870912, while the sum is 48.

The spelling of 61822136667 in words is "sixty-one billion, eight hundred twenty-two million, one hundred thirty-six thousand, six hundred sixty-seven".